kernel/amd64: Add serial debug logging

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/kern/kern_syslog.c b/sys/kern/kern_syslog.c
index 6962a69..7f66db0 100644
--- a/sys/kern/kern_syslog.c
+++ b/sys/kern/kern_syslog.c
@@ -34,6 +34,12 @@
 #include <stdarg.h>
 #include <string.h>
 
+#if defined(__SERIAL_DEBUG)
+#define SERIAL_DEBUG __SERIAL_DEBUG
+#else
+#define SERIAL_DEBUG 0
+#endif
+
 /* Global logger lock */
 static struct spinlock lock = {0};
 
@@ -44,6 +50,9 @@ syslog_write(const char *s, size_t len)
 
     while (len--) {
         cons_putch(&g_root_scr, *p);
+        if (SERIAL_DEBUG) {
+            serial_putc(*p);
+        }
         ++p;
     }
 }